Question 170809
Rosetta was paid 11.45 for babysitting the O'Connells. Mrs.O paid Rosetta in quarters and dimes. The # of quarters she recieved was five more than twice the number of dimes. How many of each coin did Rosetta receive?
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Quantity Equation: q = 2d + 5
Vale EQUATION: 25q + 10d = 1145 cents
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Rearrange:
25q - 50d = 125
25q + 10d = 1145
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Subtract 1st from 2nd to get:
60d = 1020
d = 17 (# of dimes)
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Solve for q: q = 2*17+5 = 39 (# of quarters)
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Cheers,
Stan H.